As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ENGINE START N2 REACHED 25% (LEFT IGNITION) NO LIGHT OFF OR RISE IN EGT. TRIED 2ND START ATTEMPT ENGINE START VALVE INDICATED OPEN WITH NO INDICATION OF N2 ROTATION. GROUNDED - YES. REMOVED STARTER MAGNETIC PLUG AND FOUND CONTAMINATION. REMOVED AND REPLACED STARTER REF B737-800 AMM 80-11-01. OPS CHK GOOD. REPLACED STARTER ON ENG #2.